Janis Ian (born Janis Eddy Fink; April 7, 1951) is an American singer-songwriter who was most commercially successful in the 1960s and 1970s. Her signature songs are the 1966/67 hit "Society's Child (Baby I've Been Thinking)" and the 1975 Top Ten single "At Seventeen", from her seventh studio album Between the Lines, which in September 1975 reached no. 1 on the U.S. Billboard 200 chart.

Born in Farmingdale, New Jersey, Ian entered the American folk music scene while still a teenager in the mid-1960s. Most active musically in that decade and the 1970s, she has continued recording into the 21st century. She has won two Grammy Awards, the first in 1975 for "At Seventeen" and the second in 2013 for Best Spoken Word Album, for her autobiography, Society's Child, with a total of ten nominations in eight different categories.

Ian is also a columnist and science fiction author.